Based on the Arctic 1°×1° sea-ice area index,500hPa heights,sea surface pressure(SLP) and the China 160 Stations temperature data,the relationship between the interdecadal variation of sea-ice in Davis Strait and the atmospheric circulation is discussed by statistical analysis methods.It is founded that,in the past years,the sea-ice area in the Davis Strait increased and showed a remarkably interdecadal variation,which is close associated with the WA and EU teleconnection patterns,as well as with trends of Siberia High,and winter temperature in Northern China.There are remarkable differences in 500 hPa heights,SLP,stream fields before and after 1981,when the sea-ice area in Davis Strait abruptly changed.